Toy building block



FIG. 1 is a front perspective view of a toy building block embodying ourdesign;

FIG. 2 is a back perspective view of FIG. 1;

FIG. 3 is a top plan view of FIG. 1;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a right side view of FIG. 1; and,

FIG. 7 is a right side view rotated 90 degrees of FIG. 1.

CLAIM We claim the ornamental design for a toy building block, as shownand described.